JPH033819Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a heat exchanger used to cool the inside of a casing such as a control panel that houses highly precise electronic components such as transistors and ICs.

Conventional technology In general, electronic control equipment such as NC control panels, robot controllers, and measuring instruments used in factories uses high-precision electronic components such as transistors and ICs. dust,
Because it is adversely affected by moisture, oil mist, etc., it is housed in a sealed enclosure. In this case, it is necessary to release the heat generated by the electronic components to the outside of the casing, but it is necessary to prevent outside air for cooling from mixing with the air inside the casing.

Conventionally, this type of heat exchanger has been equipped with a large number of heat transfer plates arranged in parallel with a predetermined gap, and has a high-temperature fluid passage through which high-temperature air inside the control panel flows, and an opposite flow. It is already known that low-temperature fluid channels are formed alternately with low-temperature fluid channels through which relatively dirty and cold outside air flows, and both channels are kept in an airtight state. The disadvantage of the exchanger is that it is difficult to connect the heat transfer plates, and it is not easy to manufacture.

Therefore, the applicant first removed the above drawbacks,
We proposed a heat exchanger that is easy to manufacture because the heat transfer plates are very easily joined together (see Utility Application No. 1983-200520). In the proposed heat exchanger, heat transfer plates are stacked in parallel with each other at predetermined intervals and are combined, and sealing overhangs are provided at required locations on the periphery of the adjacent heat transfer plates. The parts were butted against each other and mechanically joined to maintain airtightness. However, if a heat exchanger is constructed of heat transfer plates that all have the same thickness, stress will be placed on the heat transfer plates placed on both outer sides, causing these plates to bend, become rough, or cause undulation. As a result, the sealing protrusions become insufficiently bonded to each other, impairing the airtightness, allowing dirty outside cooling air to get mixed into the internal air, and causing trouble to the electronic equipment inside the control panel. There was a problem that occurred.

Purpose of the invention The purpose of this invention is to solve the above problems, to prevent the heat transfer plate from bending or undulating due to the waving phenomenon, to have excellent airtightness, and to provide an internal Provides a heat exchanger that can prevent dirty outdoor cooling air from entering the air, release only heat to the outside, and prevent problems with high-precision electronic components. I'm trying.

Structure of the Device In order to achieve the above-mentioned object, this device has two substantially square vertical first and second tubes arranged in parallel and alternately with a gap between them to form a fluid passage.
A heat transfer plate, a horizontal upper closing plate that covers the upper ends of all the heat transfer plates and the upper ends of the gaps between the plates and has an upper opening near the right end, and the lower ends of all the heat transfer plates. a horizontal lower closing plate that covers the lower end of the gap between the parts and the plates and has a lower opening near the left end, and reinforcing side plates arranged on both the front and rear outer sides of all the heat transfer plates; The gist is a heat exchanger equipped with

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this specification, front, back, left, right, and top and bottom are based on FIG. The front side and the bottom of the drawing sheet refer to the same back side.

In FIGS. 1 to 5, 1 is a transistor;
2 is a cooling device installed on the upper wall 1a of the control panel 1 so as to cover the opening 3 thereof; 4 is its box-shaped casing; 5 is the inside of the casing 4; This is a heat exchanger based on this idea housed in the center. Reference numeral 6 denotes an outside air circulation fan housed in the left end of the cooling device 2, which discharges air toward a louvered outlet 7 formed in the left end of the upper wall 4a of the casing 4. Note that the air sent out by this fan 6 is
The cooling fluid, that is, the outside air, is taken in from the louvered intake port 8 formed in the middle part of the upper wall 4a of the casing 4 near the right end, and the heat exchanger 5
The high-temperature air inside the control panel 1 is cooled by heat exchange, and the temperature of the air itself is raised. Reference numeral 9 denotes a fan for circulating non-cooled fluid, that is, air inside the control panel, housed in the right end of the cooling device 2, which cools the high-temperature air flowing out from the control panel 1 by passing it through the heat exchanger 5. It is then returned to the control panel 1.

The heat exchanger 5 according to this invention includes first and second rectangular vertical aluminum heat transfer plates 11 and 12 arranged in parallel and alternately with a gap 13 between them to form a fluid passage. The upper ends of the heat transfer plates 11 and 12 and the plate 1
A horizontal upper closing plate 15 made of an elastic material such as polyurethane and having an upper opening 14 near the right end and covering the upper end of the gap 13 between the heat transfer plates 11 and 12; Gap 1 between the lower end and the plates 11 and 12
3, and a horizontal lower closing plate 17 having a lower opening 16 at a portion near the left end;
A pair of front and rear reinforcing side plates 18, 18
and a tubular connecting member 19 that connects all the heat transfer plates 11, 12 and side plates 18, 18. The lower closing plate 17 also serves as the bottom wall of the casing 4, and has a cooled air return opening 10 through which the air circulation fan 9 is seen at its left end. 1st
Right upper protrusions 20 and 21 protruding forward and backward are provided facing each other at positions facing the upper opening 14 of the upper right portions of the second heat transfer plates 11 and 12, and these protrusions By abutting the tips 20a, 21a of 20, 21 against each other, every other gap 13A is closed, and the right end portions of the first and second heat transfer plates 11, 12 extend forward and backward. The right end protruding parts 22 and 23 are provided to face each other, and the tips 22a and 23a of these protruding parts 22 and 23 are butted against each other, so that the heat transfer plates 11 and 1
2, the same gap 13A as in the case of the right upper overhang parts 20 and 21 is closed, and the first and second
Left side lower overhangs 24 and 25 that extend backward and forward are provided facing each other at positions facing the lower opening 16 on the left side portions of the lower ends of the heat transfer plates 11 and 12. tip 24 of
By abutting comrades a and 25a, every other gap 13B, which is different from the case of the upper overhang parts 20 and 21, is closed, and the left end portions of the first and second heat transfer plates 11 and 12 are The left side end protruding parts 26 and 27 protruding forward are provided oppositely, and the tips 26a and 27a of these protruding parts 26 and 27 are butted against each other, so that the heat transfer plates 11 and 12 The same gap 13B as in the case of the left lower overhang parts 24 and 25 at the left end
is blocked.

The first and second heat transfer plates 11, 12 and the side plates 18, 18 are each provided with connection member insertion holes 32, and the tubular connection members 19 are inserted into these holes 32 to connect all the heat transfer plates. 11, 12 and side plates 18, 18
The heat transfer plates 11 and 12 and the side plates 18 and 18 are joined with a predetermined gap 13 in between by being inserted through the tube and expanded.

Spacing convex portions 30 and 31 are provided on both front and rear sides of the first and second heat transfer plates 11 and 12, respectively.

Block-shaped sealing members 33 made of polyurethane are attached to both left and right ends of the pair of front and rear side plates 18, 18, respectively.

Although each side plate 18 has a groove-shaped cross section, it may of course also have a flat plate shape, as shown in FIG. 6, for example.

In the above, when the outside air circulation fan 6 is operated, cold outside air flows from the louvered intake port 8 of the casing 4 and the upper opening 14 of the upper closing plate 15 to the first and second heat transfer plates 11,
12, flows into the right end of every other gap 13A between the gaps 13A, passes to the left inside the gap 13A, flows out from the left end of the gap 13A, passes through the fan 6 portion, and flows into the louver of the casing 4. It is discharged to the outside from the exhaust port 7.

On the other hand, due to the operation of the fan 9 for circulating air inside the control panel, the high temperature air inside the control panel 1 is transferred to the lower closing plate 1.
7 from the lower opening 16 to every other gap 13B between the first and second heat transfer plates 11 and 12
Flows into the left end of the gap 13B, passes to the right inside the gap 13B, and flows into the gap 13A adjacent to the gap 13A.
It is cooled by the flow of cold outside air, which is an opposite flow of air, flows out from the right end of the gap 13B, passes through the fan 9 portion, and is returned into the control panel 1 through the opening 10 of the lower closing plate 17.

In some cases, the upper wall 4a of the casing 4 may also serve as the upper closing plate 15.

In addition, in the above embodiment, the case where the heat exchanger 5 of this invention is used in a cooling device for a control panel is shown, but the heat exchanger 5 can be similarly used for heat exchange between two other types of gases. It is something that can be done.

Effects of the invention As described above, the heat exchanger according to this invention has first and second heat transfer plates 11 and 12 arranged on both outer sides of the first and second heat transfer plates 11 and 12 which are arranged in parallel and alternately with a gap 13 between them which should form a fluid passage. Reinforcement side plate 1
8 and 18, the heat transfer plate does not bend or become undulating due to waving, and has excellent airtightness, preventing dirt from entering the internal air. It is possible to prevent outside air for cooling from entering, and only heat can be released to the outside, which has the effect of preventing troubles with high-precision electronic components from occurring.

[Brief explanation of drawings]

The drawings show an embodiment of the invention; Fig. 1 is a partially cutaway plan view of the heat exchanger of the invention; Fig. 2 is an enlarged vertical sectional view of the main parts of the heat exchanger of the invention; Figure 3 is an enlarged perspective view of the heat transfer plate;
The figure is an enlarged exploded perspective view of a cooling device using a heat exchanger according to the present invention, Figure 5 is a vertical sectional view of the main part of the cooling device installed on the upper wall of the control panel, and Figure 6 is a side plate. FIG. 6 is an enlarged vertical cross-sectional view of a main part of the heat exchanger of the present invention, showing a modification of the heat exchanger of the present invention. 1... Control panel, 2... Cooling device, 5... Heat exchanger, 6, 9... Fan, 11... First heat transfer plate, 12... Second heat transfer plate, 13... Gap,
14, 16...opening, 15...upper closing plate, 17...lower closing plate, 18...side plate.

Claims (1)

[Scope of utility model registration request] Approximately rectangular vertical first electrodes are arranged in parallel and alternately with gaps 13 forming liquid flow passages.
and second heat transfer plates 11, 12, a horizontal plane that covers the upper ends of all the heat transfer plates 11, 12 and the upper end of the gap 13 between the plates 11, 12, and has an upper opening 14 near the right end. upper closing plate 15 with a shape, lower ends of all heat transfer plates 11, 12 and plates 11,
A horizontal lower closing plate 17 that covers the lower end of the gap 13 between the comrades and has a lower opening 16 near the left end, and all the heat transfer plates 11,1.
The heat exchanger is equipped with reinforcing side plates 18, 18 arranged on both the front and rear outer sides of the heat exchanger.